CVE-2021-20749

Name: CVE-2021-20749
Creator: NVD / NIST
Published: 2021-06-28T01:15:07.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2021-20749 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Cross-site scripting vulnerability in Fudousan plugin ver5.7.0 and earlier, Fudousan Plugin Pro Single-User Type ver5.7.0 and earlier, and Fudousan Plugin Pro Multi-User Type ver5.7.0 and earlier allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

Cross-site scripting vulnerability in Fudousan plugin ver5.7.0 and earlier, Fudousan Plugin Pro Single-User Type ver5.7.0 and earlier, and Fudousan Plugin Pro Multi-User Type ver5.7.0 and earlier allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.99%

58.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Nendeb	Fudousan Plugin	<= 5.7.0
Nendeb	Fudousan Plugin Pro Multi-User	<= 5.7.0
Nendeb	Fudousan Plugin Pro Single-User	<= 5.7.0

References

https://jvn.jp/en/jp/JVN93799513/index.htmlThird Party Advisory
https://nendeb.jp/fudouProduct, Third Party Advisory
https://www.nendeb-biz.jp/2021-0617-1200/Patch, Third Party Advisory
https://jvn.jp/en/jp/JVN93799513/index.htmlThird Party Advisory
https://nendeb.jp/fudouProduct, Third Party Advisory
https://www.nendeb-biz.jp/2021-0617-1200/Patch, Third Party Advisory

Timeline

Published: Jun 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20749?

How severe is CVE-2021-20749?

CVE-2021-20749 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20749?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20749?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST